Valve Guides

[D.Bo]

i need to get valve guides for my s13 sr. ive ordered some Jim Wolf Technology valve guides from the nismo shop but they have yet to send them out,its been 2 weeks, and i really need my motor to be done. i found soem SuperTech Valve guides for about the same price as the Jwt. Does anyone have any experience with supertech? Which is better Jwt or Supertech? ive searched but cant really find anything.

Here are the links to both products:
Jim Wolf Technology
http://www.thenismoshop.com/ik...12254 (http://www.thenismoshop.com/ikorb.php?func=catalog&category_id=1184&product_id=12254)

SuperTech
Supertech Bronze Valve Guides : SR20DET (RWD) (http://www.phase2motortrend.com/subrvagusrr.html)

any info will be appreciated

thanks